derailed postgres index example on GIN without datatype convertion

derailed_index_example.sql

EXPLAIN ANALYZE SELECT id, title  FROM "cards" 
  WHERE (title_tsv @@ to_tsquery( 'english', '(o:*|o)')) AND collection_id = 624
  LIMIT 10;
                                                                           QUERY PLAN                                                                            
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=408.55..447.93 rows=10 width=57) (actual time=273.000..273.103 rows=10 loops=1)
   ->  Bitmap Heap Scan on cards  (cost=408.55..554.24 rows=37 width=57) (actual time=272.999..273.101 rows=10 loops=1)
         Recheck Cond: ((collection_id = 624) AND (title_tsv @@ '''o'':* | ''o'''::tsquery) )
         Heap Blocks: exact=10
         ->  BitmapAnd  (cost=408.55..408.55 rows=37 width=0) (actual time=272.973..272.973 rows=0 loops=1)
               ->  Bitmap Index Scan on index_cards_on_collection_id  (cost=0.00..28.98 rows=1140 width=0) (actual time=0.333..0.333 rows=1128 loops=1)
                     Index Cond: (collection_id = 624)
               ->  Bitmap Index Scan on index_examples_fts_with_collection  (cost=0.00..379.31 rows=37241 width=0) (actual time=272.521..272.521 rows=123114 loops=1)
                     Index Cond: (title_tsv @@ '''o'':* | ''o'''::tsquery)
 
 Planning time: 3.457 ms
 Execution time: 273.526 ms